They typically contain a combination of static and dynamic content, such as text, images, and programs that run on the server or in the user's Web browser.

它们通常包括静态内容与动态内容的组合，如文本、图像和运行在服务器或用户的Web浏览器中的程序。

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Most Web UIs provide built-in support for high-end visualizations, such as animations and support for dynamic images like SVG.

大多数 Web UI 均提供对高端可视效果（比如动画）的内置支持和对动态图像（比如 SVG）的支持。

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The user can run a web server on EC2 delivering dynamic web pages while the static content, like images, video, and large downloads, can be handled via CloudFront.

用户可以把动态页面放在ec2上的Web服务器上，而静态内容，如图片、视频和大型的下载包，则交给CloudFront去处理。

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